---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 12/01/13: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:52 AM - Re: battery tender jr (GLEN MATEJCEK) 2. 02:24 AM - Re: Rocker switches (Carlos Trigo) 3. 03:50 AM - Re: Icom A200 transceiver () 4. 08:19 AM - Re: Icom A200 transceiver (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 01:52:55 AM PST US Subject: AeroElectric-List: Re: battery tender jr From: GLEN MATEJCEK No problemo- no hurries here. I've yet to replace my batteries, either. Just curious- ________________________________ Message 2 _____________________________________ Time: 02:24:42 AM PST US From: "Carlos Trigo" Subject: AeroElectric-List: RE: Rocker switches Thanks Ron I already had sent an email to AE, because this is probably the way to go. Regards Carlos -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ronald Cox Sent: sbado, 30 de Novembro de 2013 15:55 Subject: AeroElectric-List: Re: AeroElectric-List Digest: 8 Msgs - 11/29/13 --> Carlos, Check these guys out. This page shows where to buy the switches and they'll engrave them for you. http://www.engravers.net/aircraft/rocker_switches.htm Lots of folks in the Glasair crowd have used them. Ron Cox Glasair Super II F/T > Time: 09:26:32 AM PST US > From: "Carlos Trigo" > Subject: AeroElectric-List: Switches > > Gents > > > I am using toggle switches for non-lights (e.g. Fuel pump, Pitot heat, > Aux Battery, etc.) and both for aesthetical reasons and non-confusing > reasons, I am planning to use rocker illuminated switches for the > Lights (Landing Light, Taxi Light, Strobes, Beacon, NAV Lights, Cabin Light). > > > I am not finding a source for good rocker switches, like for example > the ones from Klixon or other good brand. Neither ACS or Stein Air > seems to carry those. > > > Can someone please point me to a source for good rocker illuminated > switches? > > > Regards > > Carlos > > > ________________________________ Message 3 _____________________________________ Time: 03:50:29 AM PST US From: Subject: RE: AeroElectric-List: Icom A200 transceiver Hello Guido, It would be helpful for you to speak to the technicians who look after the ground radio systems at Locarno to find out whether there are 2 separate transmitters operating on 134.825, but at slightly different frequencies (known as offset carrier working). This can be adopted to avoid 2 identical signals interfering with each other - they are both within the pass band of the receiver and so should reinforce each other, but it is possible that they could generate a beat frequency that interferes with the signal-to-noise squelch circuit. I have no explanation to suggest why the ground receivers should be able to accept other people's transmissions and not those from your ICOM. However, the more you know about the technical setup on the ground that connects to the 2 separate antennas, the better placed you will be to discuss with ICOM what might be causing your problem. Good luck! Mike Dr Mike Gregory From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Guido von Allmen Sent: 30 November 2013 09:21 Subject: AeroElectric-List: Icom A200 transceiver My name is Guido and I am new to this List. I have some trouble with my Icom A200 which is in my newly built Wittman Tailwind W10. Maybe this topic has already been discussed and if so can you tell where I can find this issue . Here in Locarno Switzerland ( LSZL) my local airport the tower transmits with 2 antennas at the same frequency 134.825 ( one directly on the tower and the other about 7 miles north in the direction of the runway 26 ) They told me this is due to the mountains all around the airport. Only at a certain point flying between the two antennas ( for instance on long final ) I cannot hear the tower instructions and the tower hears me only when they shut down one antenna. There is absolutely no problem with all the other airtraffic on ground and in the air. All the other airplanes don't have this problem as we were told. I already changed the antenna, its position on the plane from the bottom to the top and the antenna cable with a double shielded one but with no result. Can anyone of the Forum give me some advice how to solve this problem. I contacted Icom America where I bought the transceiver but they too couldn't get me an answer. Thanks in advance and have a nice weekend. Guido ________________________________ Message 4 _____________________________________ Time: 08:19:04 AM PST US From: "Robert L. Nuckolls, III" Subject: RE: AeroElectric-List: Icom A200 transceiver From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Guido von Allmen Sent: 30 November 2013 09:21 Subject: AeroElectric-List: Icom A200 transceiver My name is Guido and I am new to this List. I have some trouble with my Icom A200 which is in my newly built Wittman Tailwind W10. Maybe this topic has already been discussed and if so can you tell where I can find this issue . Here in Locarno Switzerland ( LSZL) my local airport the tower transmits with 2 antennas at the same frequency 134.825 ( one directly on the tower and the other about 7 miles north in the direction of the runway 26 ) They told me this is due to the mountains all around the airport. Only at a certain point flying between the two antennas ( for instance on long final ) I cannot hear the tower instructions and the tower hears me only when they shut down one antenna. There is absolutely no problem with all the other airtraffic on ground and in the air. All the other airplanes don't have this problem as we were told. I already changed the antenna, its position on the plane from the bottom to the top and the antenna cable with a double shielded one but with no result. Can anyone of the Forum give me some advice how to solve this problem. I contacted Icom America where I bought the transceiver but they too couldn't get me an answer. Thanks in advance and have a nice weekend. Guido I would not expect ICOM to be helpful . . . nor would it be helpful for you to 'do things' to your installation on the airplane. There are two ways that two antennas can work in close proximity on the same frequency to transmit . . . (1) you have two separate facilities, probably tied together by land line. In this instance, the operator of the ground based facilities chooses facility A or B to talk to any given airplane. This is done with a selector switch of some type . . . a switch that usually prevents simultaneous operation of both facilities. This is, I suspect, what has been installed at your local airport. BOTH receivers can be active at all times but when one receiver gets a strong signal from an airplane, there's an indicator lamp that tells the operator which receiver took the call and he/she is expected to select the appropriate transmitter on which to reply, But in no case would you want the both transmitters to operate simultaneously. (2) two antennas are treated as an array for generating emissions from one source or two phase-locked sources. This is fraught with potential for compromised transmissions as the receiving station (airplane) moves through the standing waves set up by troughs and peaks of alternately opposing and aiding signals from the two antennas . . . heard in the airplane as 'flutter' on the received signal. If you are experiencing a null zone between the two antennas but do not hear flutter or a beat note between the two transmitted signals . . . then it's probable that system (1) is installed and you have a severe sensitivity issue with your installation. I suspect an open coax. Check SWR on your airplane's comm antenna from the transceiver end of the feedline. How's your radio's performance for communicating with other facilities that do not have remotely located transceivers on a shared frequency? From 1000 feet up, you should be able to talk with a ground station that is 25 miles away (assuming no intervening mountains) or other airplanes from 50 to 100 miles away. Bob . . . ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.